Although not all of these side effects may occur, if they do occur they may need medical attention. Check with your doctor immediately if any of the following side effects occur while taking chloroquine: Incidence not known Some side effects of chloroquine may occur that usually do not need medical attention. Plaquenil bloodshot eyes Ankylosing spondylitis hydroxychloroquine What is plaquenil medication Plaquenil for hair loss Chloroquine is only effective against malaria from certain areas of the world. chloroquine may worsen psoriasis, seizures, hearing problems, and liver conditions. ADVERTISEMENT Chloroquine is used to treat and to prevent malaria. Chloroquine is also used to treat amebiasis infection caused by amoebae. Chloroquine may also be used for purposes not listed in this medication guide. Each tablet contains 500 mg of Chloroquine phosphate USP, equivalent to 300 mg Chloroquine base. Inactive Ingredients colloidal silicon dioxide, dibasic calcium phosphate, hydroxypropylmethylcellulose, magnesium stearate, microcrystalline cellulose, polyethylene glycol, polysorbate80, pregelatinized starch. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. These side effects may go away during treatment as your body adjusts to the medicine. Advantages of chloroquine Chloroquine Phosphate chloroquine phosphate dose., Chloroquine Uses, Side Effects & Warnings - Hydroxychloroquine slePlaquenil copay cardSle hydroxychloroquinePlaquenil bullseye retinopathy Chloroquine phosphate is used occasionally to decrease the symptoms of rheumatoid arthritis and to treat systemic and discoid lupus erythematosus, scleroderma, pemphigus, lichen planus, polymyositis, sarcoidosis, and porphyria cutanea tarda. Talk to your doctor about the possible risks of using this drug for your condition. Chloroquine MedlinePlus Drug Information. Chloroquine - FDA prescribing information, side effects.. Chloroquine Indications, Side Effects, Warnings -. Find patient medical information for Chloroquine Phosphate Bulk on WebMD including its uses, side effects and safety, interactions, pictures, warnings and user ratings. Chloroquine Phosphate, which has been used for more than 70 years, has been tested in 135 cases in Beijing and southern China's Guangdong Province. Among them, 130 patients have light and common symptoms, and five are severe patients. None of the patients with light and common symptoms have developed severe symptoms. Before the administration of chloroquine, the patient had only a mild skin erythema in the irradiated area, which was consistent with the radiotherapy dose she had received. On day 3 of chloroquine therapy, she developed localized brisk bullous eruptions in the irradiated area, which developed into a patch of fulminant moist desquamation.